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采用水热控制合成法，以六水三氯化铁、柠檬酸三钠和尿素为原料，聚丙烯酰胺为稳定剂，200 ℃下反应12 h制备得到了超顺磁性空心Fe3O4纳米微球.通过X射线衍射仪、扫描电子显微镜、透射电子显微镜对样品的结构和形貌进行表征，并采用振动样品磁强计测试了样品的磁性能.结果表明：所得样品为具有尖晶石结构的Fe3O4纳米微球，尺寸为160 nm 左右，呈分等级结构，即整个微球由粒径约18 nm 的初级晶粒自组装堆叠而成；室温下表现为典型的超顺磁性，且饱和磁化强度为73.3 emu/g （1 emu/g=1 A m2/kg），这种高饱和磁化强度可以由其初级晶粒晶化程度高且粒径较大以及这种特殊的二次自组装结构进行解释.这种Fe3O4纳米微球为疏松多孔的空心球状结构，具有粒径分布均匀、分散性良好和超顺磁性的特点，在药物靶向输运和肿瘤热疗中有潜在的应用.
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关键词:
- 水热法 /
- 空心Fe3O4纳米微球 /
- 分等级结构 /
- 超顺磁性
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[1] Zhu M Y, Liu C, Bo W Q, Hu J W, Hu Y H, Jin H M, Wang S W, Li Y 2012 Acta Phys. Sin. 61 078106 (in Chinese)[朱明原, 刘聪, 薄伟强, 舒佳武, 胡业昊, 金红明, 王世伟, 李瑛 2012 物理学报 61 078106]
[2] Zheng X C, Li X Y, He L H, et al. 2017 Chin. Phys. B 26 037502
[3] Gholizadeh A, Jafari E 2017 J. Magn. Magn. Mater. 422 328
[4] Liu R, Yang S C, Wang F, et al. 2012 ACS Appl. Mater. Inter. 4 1537
[5] Lu X G, Liu Q R, Huo G, et al 2012 Colloid Surf. A:Physicochem. Eng. Asp. 407 23
[6] Li X Y, Si Z J, Lei Y Q, et al. 2011 Cryst. Eng. Comm. 13 642
[7] Hao H Q, Ma Q M, He F, et al. 2014 J. Mater. Chem. B 2 7978
[8] Ling Y, Tang X Z, Wang F J, et al. 2017 RSC Adv. 7 2913
[9] Gu L, He X M, Wu Z Y 2014 Mater. Res. Bull. 59 65
[10] Casula M F, Floris P, Innocenti C, et al. 2010 Chem. Mater. 22 1739
[11] Shen L Z, Qiao Y S, Guo Y, et al. 2013 Optoelecyron. Adv. Mat. 7 525
[12] Song L N, Zang F C, Song M J, et al. 2015 J. Nanosci. Nanotechno. 15 4111
[13] Claire C, Philippe R, Jean M I, et al. 2006 Adv. Drug. Deliver. Rer. 58 1478
[14] Alexion C, Amold W, Hulin P, et al. 2001 J. Magn. Magn. Mater. 225 187
[15] Liu R T, Liu J, Tong J Q, et al. 2012 Prog. Nat. Sci. 22 31
[16] Li Q 2010 Beijing Biomed. Eng. 29 308 (in Chinese)[李强 2010 北京生物医学工程 29 308]
[17] Barakat N S 2009 Nanomedicine-UK 4 799
[18] Frey N A, Peng S, Cheng K, et al. 2009 Chem. Soc. Rev. 38 2532
[19] Qin R H, Jiang W, Liu H Y, et al. 2007 J. Funct. Mater. 6 902 (in Chinese)[秦润华, 姜炜, 刘宏英, 等 2007 功能材料 6 902]
[20] Bo W, Song L, Li S H, et al. 2007 J. Chongqing Med. Univ. 32 922 (in Chinese)[柏玮, 宋琳, 李少林, 等 2007 重庆医科大学学报 32 922]
[21] Zhang Y K, Luo C, Zhu C M 2011 J. Third Mil. Med. Univ. 33 1224 (in Chinese)[张玉坤, 罗聪, 朱朝敏 2011 第三军医大学学报 33 1224]
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